very awesome idea with the pipe and rolling the door , im visiting my local greenthum/ homeD today to price an check it all...my project is a 4x4,78' tent, ill have a 2x2 x4 x 66' tent inside of it , idea being a 4-5 plant perpetual, smaller tent for germ/vegging (lighted accordingly), and the larger portion for flowering again lighted accordingly, all discreet,professional high yield personal producer, just have to up ventilation like crazy , but not an issue,,,truth be told I was thinkin of making the smaller tent shell out of that thicker heat resistant mylar type of fabric( almost looks like the material used for sun visors in a vehicle<cant remember the name) , as to keep a good amount of light reflecting inside flowering portion an to minimize cost of shell as it will be dual side reflection an no need to purchase secondary outter shell ,but again more advice there would be nice ,, the tent will have all ventilation features as a purchased tent , all in all a lot of homework before I start sewing but .. yalls feed back is most appreciated ,thanks for helpn out